feat: Add GlowTrack mood and habit wellbeing grid specifications

- Introduced export schema for JSON data structure.
- Created renderer contract detailing canvas/SVG rendering requirements.
- Defined IndexedDB storage schema and migration strategies.
- Documented data model including entities and relationships.
- Developed implementation plan outlining execution flow and project structure.
- Provided quickstart guide for development environment setup.
- Compiled research documentation on performance, accessibility, and theming.
- Established feature specification with user scenarios and functional requirements.

specs/001-glowtrack-a-mood/contracts/renderer.md

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+# Renderer Contract — Canvas/SVG
+
+## Purpose
+Render a grid of DayTiles with mood hue, glow intensity from net habit score, negative overlay static, and glyph counts.
+
+## Inputs
+- containerSize: { width: px, height: px, devicePixelRatio }
+- days: DayTile[] (ordered by date)
+- theme: palette + CSS variables
+- options:
+  - showLegend: boolean
+  - pngScale: number (for export)
+
+## Outputs
+- On-screen render at 60 fps target
+- Exported PNG at screen resolution (pngScale defaults to 1.0)
+
+## Rules
+- Base hue from mood.hue; luminance curve f(netScore) with easing and clamping
+- Negative entries: apply subtle static texture overlay (non-hue-altering)
+- Glyphs: ticks = count(positive), dots = count(negative)
+- No hue change from overlays; only luminance/texture affected
+
+## Performance
+- Batch draw tiles; minimize layout/paint; avoid per-frame allocations
+- Prefer Canvas for tiles; SVG for glyph overlays and interactive focus rings
+- Ensure keyboard focus indicators meet WCAG AA contrast
+
+## Accessibility
+- Keyboard navigable tiles (tab/arrow); ARIA labels describing day, mood, counts
+- High-contrast theme variant; color-blind palettes via CSS variables